Improved capacity of redox-active functional carbon cathodes by dimension reduction for hybrid supercapacitors

Tianyuan Liu; Byeongyong Lee; Michael J. Lee; Jinho Park; Zhongming Chen; Suguru Noda; Seung Woo Lee

doi:10.1039/c7ta10881h

Improved capacity of redox-active functional carbon cathodes by dimension reduction for hybrid supercapacitors

Tianyuan Liu, Byeongyong Lee, Michael J. Lee, Jinho Park, Zhongming Chen, Suguru Noda, Seung Woo Lee^*

^*Corresponding author for this work

School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

Hybrid supercapacitors, which combine the advantages of supercapacitors and rechargeable batteries, have the potential to meet the demands of both high-energy and -power in electrochemical energy storage systems. However, the energy density of the hybrid supercapacitors has been limited because of the low capacity of the activated carbon cathode. Here we introduce a high-capacity carbon cathode containing plenty of oxygen functional groups that are redox-active towards both Li- and Na-ions. This functional carbon has an ultra-thin two-dimensional structure that has significant advantages in utilizing the redox reactions. The functional carbon cathode can exhibit very high capacities of ∼250 mA h g^-1 in Li-cells and ∼210 mA h g^-1 in Na-cells. A hybrid supercapacitor consisting of the two-dimensional functional carbon cathode with a commercial level loading density of ∼9.3 mg cm^-2 and a Si-based anode delivers a high-energy density of ∼182 W h kg^-1 at a high-power density of 1 kW kg^-1.

Original language	English
Pages (from-to)	3367-3375
Number of pages	9
Journal	Journal of Materials Chemistry A
Volume	6
Issue number	8
DOIs	https://doi.org/10.1039/c7ta10881h
Publication status	Published - 2018

ASJC Scopus subject areas

Chemistry(all)
Renewable Energy, Sustainability and the Environment
Materials Science(all)

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10.1039/c7ta10881h

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title = "Improved capacity of redox-active functional carbon cathodes by dimension reduction for hybrid supercapacitors",

abstract = "Hybrid supercapacitors, which combine the advantages of supercapacitors and rechargeable batteries, have the potential to meet the demands of both high-energy and -power in electrochemical energy storage systems. However, the energy density of the hybrid supercapacitors has been limited because of the low capacity of the activated carbon cathode. Here we introduce a high-capacity carbon cathode containing plenty of oxygen functional groups that are redox-active towards both Li- and Na-ions. This functional carbon has an ultra-thin two-dimensional structure that has significant advantages in utilizing the redox reactions. The functional carbon cathode can exhibit very high capacities of ∼250 mA h g-1 in Li-cells and ∼210 mA h g-1 in Na-cells. A hybrid supercapacitor consisting of the two-dimensional functional carbon cathode with a commercial level loading density of ∼9.3 mg cm-2 and a Si-based anode delivers a high-energy density of ∼182 W h kg-1 at a high-power density of 1 kW kg-1.",

author = "Tianyuan Liu and Byeongyong Lee and Lee, {Michael J.} and Jinho Park and Zhongming Chen and Suguru Noda and Lee, {Seung Woo}",

note = "Funding Information: This work is supported by the Samsung Advanced Institute of Technology (SAIT)'s Global Research Outreach (GRO) Program. This work was performed in part at the Georgia Tech Institute for Electronics and Nanotechnology, a member of the National Nanotechnology Coordinated Infrastructure, which is supported by the National Science Foundation (Grant ECCS-1542174). S. W. L. acknowledges the Korean-American Scientists and Engineers Association Young Investigator Grant. S. N. thanks JSPS for Kakenhi Grant No. JP16H06368. Publisher Copyright: {\textcopyright} The Royal Society of Chemistry 2018.",

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AU - Liu, Tianyuan

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AU - Chen, Zhongming

AU - Noda, Suguru

AU - Lee, Seung Woo

N1 - Funding Information: This work is supported by the Samsung Advanced Institute of Technology (SAIT)'s Global Research Outreach (GRO) Program. This work was performed in part at the Georgia Tech Institute for Electronics and Nanotechnology, a member of the National Nanotechnology Coordinated Infrastructure, which is supported by the National Science Foundation (Grant ECCS-1542174). S. W. L. acknowledges the Korean-American Scientists and Engineers Association Young Investigator Grant. S. N. thanks JSPS for Kakenhi Grant No. JP16H06368. Publisher Copyright: © The Royal Society of Chemistry 2018.

PY - 2018

Y1 - 2018

N2 - Hybrid supercapacitors, which combine the advantages of supercapacitors and rechargeable batteries, have the potential to meet the demands of both high-energy and -power in electrochemical energy storage systems. However, the energy density of the hybrid supercapacitors has been limited because of the low capacity of the activated carbon cathode. Here we introduce a high-capacity carbon cathode containing plenty of oxygen functional groups that are redox-active towards both Li- and Na-ions. This functional carbon has an ultra-thin two-dimensional structure that has significant advantages in utilizing the redox reactions. The functional carbon cathode can exhibit very high capacities of ∼250 mA h g-1 in Li-cells and ∼210 mA h g-1 in Na-cells. A hybrid supercapacitor consisting of the two-dimensional functional carbon cathode with a commercial level loading density of ∼9.3 mg cm-2 and a Si-based anode delivers a high-energy density of ∼182 W h kg-1 at a high-power density of 1 kW kg-1.

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Improved capacity of redox-active functional carbon cathodes by dimension reduction for hybrid supercapacitors

Abstract

ASJC Scopus subject areas

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